Three-channel, 24-bit, 64-kSPS, simultaneous-sampling, delta-sigma ADC | PW | 20 | -40 to 125

The ADS131M03 is a three-channel, simultaneously-sampling, 24-bit, delta-sigma

(ΔΣ), analog-to-digital converter (ADC) that offers wide dynamic range, low power,

and energy-measurement-specific features, making the device an excellent fit for

energy metering, power metrology, and circuit breaker applications. The ADC inputs

can be directly interfaced to a resistor-divider network or a power transformer to

measure voltage or to a current transformer, shunt, or a Rogowski coil to measure

current.

The individual ADC channels can be

independently configured depending on the sensor input. A low-noise, programmable

gain amplifier (PGA) provides gains ranging from 1 to 128 to amplify low-level

signals. Additionally, this device integrates channel-to-channel phase calibration

and offset and gain calibration registers to help remove signal-chain errors.

A low-drift, 1.2-V reference is

integrated into the device reducing printed circuit board (PCB) area. Optional

cyclic redundancy checks (CRCs) on the data input, data output, and register map

maintain communication integrity.

The complete analog front-end (AFE) is

offered in a 20-pin TSSOP package or a leadless 20-pin WQFN package and is specified

over the industrial temperature range of –40°C to +125°C.